Knapik, Wioletta, Paweł Malicki, and Jacek Puchała. 2015. “SOCIO-ECONOMIC CONDITIONS OF INNOVATIVE FORMS OF APPLE PROCESSING”. Acta Scientiarum Polonorum. Oeconomia 14 (4), 49-59. https://js.wne.sggw.pl/index.php/aspe/article/view/4197.